Thank God. Was she avoiding another vehicle for her to end up on the embankment ? Small or large vehicle ? Have you had her tested for possible head trauma ? A cousin of mine had a similar incident and later on he was suffering terrible headaches and it happened because of being violently shaken in the vehicle. It was caused, so I was told, due to very high and sudden G forces which caused the brain protective lining to be injured. He had to go on observation and as time went on they did an MRI and found it had healed but it could have been real bad. Just be safe. Not trying to be alarmist, just concerned.